CN104579469B - Support the ambulant apparatus and method of the mobile terminal of execution visible light communication - Google Patents
Support the ambulant apparatus and method of the mobile terminal of execution visible light communication Download PDFInfo
- Publication number
- CN104579469B CN104579469B CN201410837818.9A CN201410837818A CN104579469B CN 104579469 B CN104579469 B CN 104579469B CN 201410837818 A CN201410837818 A CN 201410837818A CN 104579469 B CN104579469 B CN 104579469B
- Authority
- CN
- China
- Prior art keywords
- terminal
- coordinator
- response signal
- mobile terminal
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
- H04B10/114—Indoor or close-range type systems
- H04B10/116—Visible light communication
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
- H04B10/114—Indoor or close-range type systems
- H04B10/1143—Bidirectional transmission
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
- H04B10/114—Indoor or close-range type systems
- H04B10/1149—Arrangements for indoor wireless networking of information
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computing Systems (AREA)
- Optical Communication System (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Provide support for the mobility method and device of mobile terminal in visible light communication (VLC) system.The described method includes：Necessary light source for VLC is only activated in view of the mobility of mobile terminal, rather than uses all light sources for VLC.Therefore, power consumption can be significantly decreased.
Description
The application is the applying date (international filing date) for September in 2010 17 days, and Application No. 201080041654.9 is (international
Application No. PCT/KR2010/006450), it is entitled " to support to perform the ambulant of the mobile terminal of visible light communication
The divisional application of the application for a patent for invention of apparatus and method ".
Technical field
The present invention relates generally to visible light communication (Visible Light Communication, VLC) system, and more
Add it particularly relates to support and the VLC device that is included in VLC systems perform VLC mobile terminal mobility
(mobility) apparatus and method.
Background technology
As its name, VLC refers to the wireless communication technique to communicate using the light in visible wavelength bands.VLC is
Replacement to the communication plan based on radio frequency, and it has been carried out actively using light emitting diode (LED) by increasing
Research.
Fig. 1 shows traditional visible light communication (VLC) system.
With reference to figure 1, traditional VLC systems include headlamp 100 and mobile terminal 105.Headlamp 100 include LED 115 or
At least one in person's laser diode (LD), its color and luminous intensity can be controlled such that headlamp 100 provides photograph
Bright function and the data received by using visible ray transmission from access point (AP).Mobile terminal 105 includes being used for shine
Bright lamp 100 performs data sending and the VLC transceiver (not shown) received.AP 110 is connected with headlamp 100, so as to via photograph
Bright lamp 100 provides a user data service.The frequency band used in headlamp 100 allows the data transfer of high speed.Receiving side, also
That is mobile terminal 105, handles visible ray using such as photodiode (Photo Diode, PD), thus performs VLC.
In traditional VLC systems, as shown in fig. 1, physics movement is only considered.More specifically, mobile terminal 105 is in list
VLC is performed under one headlamp 100, so that only realizing VLC in the region covered by headlamp 100.
The content of the invention
Technical problem
Equally, in general, providing illumination functions and communication function, person by using all LED being included in headlamp
The utilization for the advantages of hampering to LED, that is, low-power consumption because data transfer is performed using communication function, or even positioned at
Do not have in the LED in the region of mobile terminal, therefore cause unnecessary power consumption.
Therefore, in existing VLC systems, identical data is sent without the shifting in view of mobile terminal by all light sources
Dynamic property, thus causes unnecessary power consumption.
Technical solution
The present invention is designed to solve at least the above occurred in the prior art.
Therefore, an aspect of of the present present invention will be provided for effectively supporting the mobility of mobile terminal, thus provide it is seamless
The apparatus and method of VLC services.
According to an aspect of of the present present invention, there is provided a kind of to be used to be supported to perform the mobile end of VLC with VLC device by VLC device
The mobility method at end.The described method includes：Using a part for all light sources by VLC device management with the movement
Terminal switch data, by the partially formed visible ray effective coverage (active of all light sources of VLC device management
Region), and the mobile terminal is located in visible ray effective coverage, it is determined whether the movement from visible ray effective coverage
Terminal receives the response signal of the success of instruction data receiver or failure, if be not received by visible ray effective coverage
Response signal, then extend visible ray effective coverage, it is determined whether is received from the mobile terminal in the visible ray effective coverage of extension
To response signal, and if being successfully received response signal, newly visible is set based on the position for receiving response signal
Light effective coverage.
According to another aspect of the present invention, there is provided a kind of ambulant dress for the mobile terminal for being used to support to perform VLC
Put.Described device includes：Light source manager, for managing the information on each in multiple light sources, and only determines more
It will be activated for a part of VLC in a light source；Light source ON/OFF controller, for providing institute of the VLC functions to multiple light sources
State part；And controller, for exchanging data with mobile terminal using the part of multiple light sources, the multiple light source
Partially formed visible ray automated regional, and the mobile terminal is located in visible ray effective coverage, it is determined whether from can
The mobile terminal seen in light effective coverage receives the response signal of the success of instruction data receiver or failure, if in visible ray
In effective coverage receive response signal failure, then by increase by the part of the multiple light sources activated by light source manager come
Extend visible ray effective coverage, it is determined whether response signal is received from the mobile terminal in the visible ray effective coverage of extension,
And if being successfully received response signal, new visible ray effective coverage is set based on the position for receiving response signal.
According to another aspect of the present invention, there is provided a kind of to be used to support to perform and the coordinator from coordinator
The mobility method of the terminal of optic communication VLC, this method include：Use at least one light source of first community in multiple cells
Data are sent to the terminal；Determine whether to receive response signal from the terminal in first community；If do not receive
To the response signal, then the terminal is searched in the adjacent cell of first community；And if in the adjacent cell
The terminal is located, then the adjacent cell is determined as serving cell.
According to another aspect of the present invention, there is provided it is a kind of to be used to perform the coordinator with the visible light communication VLC of terminal,
The coordinator includes：Controller, at least one light source for being controlled so as to the first community into multiple cells send number
According to, it is determined whether response signal is received from the terminal in first community, if being not received by the response signal,
The terminal is searched in the adjacent cell of first community, and if located the terminal in the adjacent cell,
The adjacent cell is determined as serving cell.
According to another aspect of the present invention, there is provided a kind of to be used to be supported in visible light communication VLC systems by coordinator
The mobility method of terminal, this method include：Number is sent to the terminal in the sector including at least one light source
According to；If not receiving response signal from the terminal in the sector, search for and wherein receive institute from the terminal
State the sector of response signal；And if having successfully received the response signal from the sector searched, will wherein it receive
Serving cell is arranged to the sector searched of the response signal.
According to another aspect of the present invention, there is provided it is a kind of to be used to perform the coordinator with the visible light communication VLC of terminal,
The coordinator includes：Controller, for be controlled so as into sector at least one light source send data, if not from
The terminal in the sector receives response signal, then searches for the fan that the response signal is wherein received from the terminal
Area, and the sector searched for wherein receiving the response signal is arranged to serving cell.
According to another aspect of the present invention, there is provided a kind of mobile terminal for being used to perform visible light communication VLC, the movement
Terminal includes：Transceiver, at least one light source for the first community from multiple cells by coordinator management receive data；
Controller, for controlling the transceiver to send response signal to the coordinator in response to receiving data, if not the
One cell receives the response signal, then controls the transceiver to be connect from least one light source of the adjacent cell of first community
Data are received, and in response to the data received from the adjacent cell, control the transceiver to be sent out to the coordinator
Send response signal.
According to another aspect of the present invention, there is provided a kind of method for performing visible light communication VLC, this method bag
Include：At least one light source of first community by mobile terminal from multiple cells by coordinator management receives data；In response to
Data are received, response signal is sent from the mobile terminal to the coordinator；If do not received in first community described
Response signal, then receive data by the mobile terminal from least one light source of the adjacent cell of first community；And response
In the data from the adjacent cell, response signal is sent from the mobile terminal to the coordinator.
According to another aspect of the present invention, there is provided a kind of mobile terminal for being used to perform visible light communication VLC, the movement
Terminal includes：Transceiver, at least one light source for the first community from multiple cells by coordinator management receive data；
And controller, for controlling the transceiver to send response signal to the coordinator in response to receiving data, wherein, if
The response signal is not received in first community, then the coordinator search wherein receives the sound from the terminal
The cell of induction signal, and if receiving the response signal from the cell searched, the coordinator will search
Cell is arranged to serving cell.
According to another aspect of the present invention, there is provided a kind of mobile terminal for being used to perform visible light communication VLC, the movement
Terminal includes：Transceiver, at least one light source for the first community from multiple cells by coordinator management receive data；
And controller, for controlling the transceiver to send response signal to the coordinator in response to receiving data, and control institute
Transceiver is stated, wherein, if being not received by the response signal, searched for by adjacent cell of the server for first community
The mobile terminal, and if the mobile terminal is located in the adjacent cell, the adjacent cell is confirmed as taking
Business cell.
Beneficial effect
According to an embodiment of the invention, the seamless continuous communiction service of mobile terminal can be provided, and by using only
Essential regions rather than reduce power consumption by using all LED for forming headlamp.
Brief description of the drawings
The above-mentioned and other aspect, feature and benefit of the particular embodiment of the present invention by from below in conjunction with attached drawing specifically
It is more obvious in bright, in attached drawing：
Fig. 1 shows traditional visible light communication (VLC) system；
Fig. 2 shows VLC systems according to an embodiment of the invention；
Fig. 3 is to show shifting according to an embodiment of the invention, for supporting mobile terminal by adjusting the number of light source
The flow chart of the method for dynamic property；
Fig. 4 to Fig. 7 shows light that is according to an embodiment of the invention, being activated by the movement (movement) of mobile terminal
Source；
Fig. 8 be show it is according to an embodiment of the invention, for supporting mobile terminal by varying sector (sector)
Mobility method flow chart；And
Fig. 9 to Figure 12 shows the light source of mobile activation according to an embodiment of the invention, by mobile terminal.
Embodiment
Hereinafter, various embodiments of the present invention will be described in detail with reference to the attached drawings.Through attached drawing, identical reference number
The element identical with symbol reference.Here in conjunction with the detailed description of function and structure well known to those skilled in the art will be saved
Go, to avoid the present invention is unnecessarily obscured.
Although the term defined in VLC fields will be used to describe the present invention, these standards do not limit this with specified
The scope of invention.
According to the embodiment of the present invention, when entering the VLC system administrations by being connected to single headlamp by mobile terminal
Cell to exchange data when, and if receive with from mobile terminal receive the corresponding response signal of data failure, VLC
System increases the number of light sources for the headlamp that will be activated for VLC, is then based on receiving instruction normal number from mobile terminal
Visible ray effective coverage is determined according to the time point of received signal.Alternatively, it is possible to visible ray is determined in sector location
Effective coverage, wherein each sector includes the light source of predetermined number.Therefore, by using VLC in view of the mobile of mobile terminal
Some available light sources of equipment send data, rather than by using all available light sources, more effectively manage power consumption.
Fig. 2 shows VLC systems according to an embodiment of the invention.
With reference to figure 2, VLC systems include headlamp 200, are connected to each headlamp 220 and are performed with mobile terminal 230
The VLC device 220 and mobile terminal 230 of VLC.
Headlamp 200 includes multiple light sources 210 and the photodiode for detecting the signal from mobile terminal 230
(PD)215.Headlamp 200 provides general illumination function, also serves as the transmitter for sending signal.For example, light source 210 can be
LED or laser diode (LD).
The embodiment of the present invention proposes mobility, some available lights using headlamp 200 in view of mobile terminal 230
Source rather than spatial mobility function (the spatial mobility that data are simply sent using all available light sources
function).Therefore, VLC device 220 according to an embodiment of the invention is connected with headlamp 200, for managing headlamp
200 light source (or some sectors of headlamp 200, each sector include the light source of predetermined number).For example, VLC device 220
It can be the access point (AP) for VLC.VLC device 220 is to positioned at the light source 210 including headlamp 200 and with predetermined
Mobile terminal 230 in the sector of number light source provides data service.Equally, only made by the movement based on mobile terminal 230
The sector needed with VLC, can reduce power consumption.
The light source manager of light source of the VLC device 220 including light source ON/OFF controller 222, for managing headlamp 200
224 and controller 226, controller 226 be used to determining mobile terminal 230 whether enter managed by controller 226 cell,
Identify the request of the request activation space mobility functions from mobile terminal 230 and perform the function.
More specifically, light source manager 224 has the information of the sector of the headlamp on being managed by VLC device 220
And the information on the user in respective sectors, and determine to carry communication function in which sector from described information
Supply light source.Light source manager 224 has the sector on the identifier (ID) of each light source and for managing each light source
ID information.Light source manager 224 also determines to be activated to support the mobility of mobile terminal 230 among all light sources
Light source number.Alternatively, if light source manager 224 determines to support the movement of mobile terminal 230 in sector location
Property, then which sector will be activated, wherein each sector includes the light source of predetermined number.
Light source ON/OFF controller 222 determines communication function will be provided to light source in which sector.Therefore, light source open/
The information that controller 222 sends transmission data and the sector of light source 210 will be provided on communication function is closed, is thus allowed
Pass through the signal transmission of the light source 210 of sector.
When receiving negative confirmation (NACK) signal for representing sector change request by PD 215, controller 226 is true
Determine mobile terminal 230 to have moved, and light source of the communication function to another sector is provided.More specifically, controller 226
Determine whether to have been received by the NACK signal corresponding to data receiver failure, and if having been received by NACK signal,
Increase by the number of the light source activated by light source manager 224 to extend visible ray effective coverage, and determine whether from
Mobile terminal 230 in the visible ray effective coverage of extension receives ack signal.If having been received by ack signal, control
Device 226 changes visible ray effective coverage based on the position (ACK signal-received place) for receiving ack signal.Under
Such operation of controller 226 will be more fully described in face with reference to figure 3 and Fig. 8.
Mobile terminal 230 includes being used for the receiver 232, transmitter 234 and controller via visible light-receiving data
236.Receiver 232 includes being used to the visible light signal inputted from external source being transformed to electric signal.PD 245 is installed in light
Between source 244.Electric signal from PD 245 reverts to data by demodulator 246.The data are recovered by channel decoder 247
For the signal initially sent.Although transmitter 234 and receiver 232 are included in mobile terminal 230 in fig. 2, it
Can also provide positioned at ceiling and in the VLC device 220 in mobile terminal 230.
Transmitter 234 includes line coding device 240, channel encoder 241, modulator 242, light source drive 243 and light source
244.Input data is converted using various line coding methods by line coding device 240, for example, non-return-to-zero (Non Return to
Zero, NRZ), 8B10B etc..Loss of data, channel encoder occurs in radio frequency space (radio space) in order to prevent
241 use channel coding scheme.Data modulation is performed by modulator 242 and is used for data transfer.Then modulation data is input into
Light source drive 243, and light is transformed to by light source 244.Light source drive 243 and the light source ON/OFF of VLC device 220 control
Device 222 connects, and to provide simple illumination functions in the case where not requiring data transfer, and if requires data transfer
The function and illumination functions that signal is sent from modulator 242 are then provided at the same time.
According to the embodiment of the present invention, VLC is performed in the mobile terminal 230 with entering the cell managed by VLC device 220
When, VLC device 220 determines that mobile terminal 230 has moved out (move out) when receiving NACK signal from mobile terminal 230
Cell, and therefore, number of the increase for the light source of data transfer.Upon receipt of the ack signal, VLC device 220 is based on connecing
The position for receiving ack signal changes visible ray effective coverage.
According to an alternative embodiment of the invention, when receiving NACK signal from mobile terminal, VLC device 220 is based on
The position of NACK signal is received, that is, receives the position of NACK, (each sector includes the light of predetermined number from multiple sectors
Source) sector is determined in the middle.When receiving ack signal in identified sector, VLC device 220 is based on receiving ACK
The position of signal changes visible ray effective coverage.Therefore, adjust number of light sources or change the space coupling method of effective sector
The mobility of mobile terminal is supported, referred to herein as " spatial mobility function ".
Fig. 3 is to show shifting according to an embodiment of the invention, for supporting mobile terminal by adjusting the number of light source
The flow chart of the method for dynamic property.
With reference to figure 3, in step 300, VLC device 220 performs terminal and finds operation to find to enter by VLC device
The mobile terminal of the cell of 220 management.More specifically, VLC device 220 finds the mobile end into visible ray effective coverage
End, it is illuminated by the light source of the predetermined number among all light sources for being managed by VLC device 220.
In step 305, VLC device 220 determines whether to have been found that mobile terminal.If not finding mobile terminal,
Then after a predetermined time, in step 300, VLC device performs another terminal and finds operation.If it find that movement
Terminal, then in the step 310, VLC device 220 by exchange information perform link negotiation operate, so as to the movement found
Terminal 230 performs VLC.In step 315, VLC device 220 establishes the communication chain to mobile terminal 230 using the information exchanged
Road.
Although describing link connection process with regard to VLC device 220, identical processing can be applied to movement
Terminal 230.It is mounted with for example, once entering in the region of headlamp 200, mobile terminal 230, which can then determine whether to exist, appoints
What execution VLC's has found VLC device 220.If there is the VLC device 220 having found, then mobile terminal foundation is set to VLC
Standby 220 communication link.
When completing link connection, in step 320, mobile terminal 230 is exchanged by data transfer with VLC device 220
Data.
For example, as shown in Figure 4, when mobile terminal 230 is located in visible ray effective coverage 400, VLC device 220 is sent out
Show mobile terminal 230 and exchange data with mobile terminal 230 using visible ray.During data exchange, if mobile terminal
230 move along the direction of 410 instructions, then it removes the region managed by VLC device 220.In this case, VLC device 220
The mobile terminal 230 in PD from positioned at the current region for VLC activation receives NACK signal.In the embodiment of the present invention
In, using NACK signal as instruction data reception failure response signal an example.NACK signal from receive data
The mobile terminal 230 of failure is sent.According to the embodiment of the present invention, NACK signal is used to request 220 activation space of VLC device
Mobility functions.On the contrary, according to the embodiment of the present invention, ack signal is used as representing the response signal for normally receiving data.
The example of the frame header (header) of NACK signal is shown in table 1 below.
Table 1
| Position | Annotation | |
| Version number (Version number) | 3 | Inform version number |
| Safety (Secure) | 1 | Safe ON/OFF |
| ACK strategies (ACK policy) | 2 | ACK/NACK |
| Frame type (Frame type) | 3 | Observability/ACK/ data/management |
| Frame subtype (Frame sub-type) | 10 | Depending on frame type |
| Retry (Retry) | 1 | Whether re-transmission |
| Source address (Source address) | 8 | Source address |
| Destination address (Destination address) | 8 | Destination address |
| Sequence number (Sequence number) | 12 | No. PDU |
| PDU numbers (Num PDUs per frame) per frame | 8 | It is grouped the number of PDU |
| Spatial mobility (Spatial mobility) | 4 | Spatial mobility is asked to AP |
| Reserved field (Reserved fields) |
Reference table 1, according to the embodiment of the present invention, the spatial mobility field of NACK signal frame is used to request VLC and sets
Standby 220 activation space mobility functions.That is, mobile terminal 230 ask VLC device 220 change VLC device 220 can
Support scope.Version number field represents the Standard Edition of present frame.Secure fields indicate whether to have used security function.ACK plans
Slightly field is indicated whether using ACK strategies.The type of the frame used in frame type field instruction VLC, such as beacon/observability/
Confirmation/data/management (beacon/visibility/ack/data/management) frame.Frame sub-type field is according to frame
Type is used for the value of the additional function of frame.Field is retried to indicate whether to need to retransmit.DAF destination address field indicates the source of transmitter
Address.DAF destination address field indicates the address of receiver.The sequence number of the current PDU of sequence-number field instruction, and the PDU numbers per frame
The instruction of mesh field includes the number of PDU in the current frame.Reserved field is reserved for use later.
In step 325, VLC device 220 determines whether to have been received by NACK signal, and if it is, in step
Increase is used for the number for sending the light source of data in 330, and as shown in Figure 5.Number of light sources for sending data is pre-
Fixed, and VLC device 220 can increase light source step by step according to the number for receiving NACK signal and/or ack signal failure
Number.By the number for increasing light source in a manner of step by step, it is seen that light effective coverage 500 is expanded, as shown in Figure 5.This
In, it is seen that light effective coverage is the region illuminated by the light source activated.The size of visible ray effective coverage is according to mobile terminal 230
Moving direction and translational speed and change.
In step 335, VLC device 220 determines whether to have been received by ack signal.If it is, VLC device 220 is true
Determine mobile terminal 230 to have moved and in visible ray effective coverage 500.Therefore, in step 345, VLC device 220
Visible ray effective coverage 500 is changed based on the position for receiving ack signal.
Hereafter, in step 350, it is otherwise square unless answering the request of VLC device 220 or mobile terminal 230 to terminate connection
Method returns to step 320.
The visible ray effective coverage 500 shown in Fig. 5 is changed into the current location with mobile terminal 230 as shown in Figure 6
Corresponding visible ray effective coverage 600, that is, it is seen that light effective coverage is extended simultaneously based on the position for receiving ack signal
And illuminated by the light source of initial predetermined number.In addition, the size of visible ray effective coverage can be according to the movement of mobile terminal 230
Direction and translational speed and change.
VLC device 220 knows the position for the PD for having been received by ack signal, and the location determination for being hereby based on PD is covered
Cover area, that is, it is seen that light effective coverage 600.
If not yet receiving ack signal in step 335, in step 340 to receiving ack signal and/or NACK
The number of Signal Fail is counted, to determine whether received ack signal and/or NACK signal failure n times.
If the number of failure is less than N, VLC device 220 gradually increases the number of light source in a step 330.But such as
Fruit receives ack signal and/or NACK signal and fails n times in step 340, then the position of mobile terminal 230 is not yet tested
Measure.Therefore, VLC device 220 performs another terminal and finds and repeat subsequent operation in step 300.
More specifically, if receiving ack signal and/or NACK signal, unsuccessfully n times, VLC device 220 will be mobile
Terminal 230 is considered as the region for having moved out and being supported by VLC device 220, and therefore, repeats the discovery behaviour to another terminal
Make.
For example, as shown in Figure 7, if the direction that mobile terminal 230 is indicated with arrow 710 is moved, it is fully removed
Visible ray effective coverage 700, causes to receive the failure of both whole ack signals and NACK signal by VLC device 220.
Fig. 8 is to show mobility according to an embodiment of the invention, for supporting mobile terminal by varying sector
Method flow chart.In fig. 8, before step 800, perform it is being represented by ' A ', with the step 300 of Fig. 3 to 315 identical
The step of.But because these steps are described above, Fig. 8 will be illustrated starting at from step 800 below.
With reference to figure 8, in step 800, VLC device 220 performs VLC, such as transmits data to visible ray effective coverage
In mobile terminal 230.According to an alternative embodiment of the invention, as shown in Figure 9, the management of VLC device 220 forms headlamp
Light source, such as the electronic data display in sector location, wherein each sector includes the light source of predetermined number, for example, 4
Light source.VLC device 220 and the mobile terminal 230 at least one visible ray effective coverage illuminated in by multiple sectors
Perform VLC.
When mobile terminal 230 is located in the visible ray effective coverage 900 illuminated by sector, as shown in figure 9, mobile terminal
230 exchange data with VLC device 220.But if mobile terminal 230 is moved along the direction that arrow 910 indicates, it is mobile whole
End 230 removes visible ray effective coverage 900.VLC device 220 is from the movement in the PD in addition to visible ray effective coverage 900
Terminal 230 receives NACK signal.
Therefore, in step 805, it is determined whether have been received by NACK signal.If it is, in step 807, VLC
Equipment 220 is determined whether there is from mobile terminal 230 to activation space mobility functions based on the NACK signal received
Request, for example, by reference to table 1.VLC device 220 checks MAC headers.If by checking that MAC headers determine that there are space
Mobility is asked, then VLC device 220 is set the sector of activation in view of the movement of mobile terminal 230.In such case
Under, ack signal and/or NACK signal can be received in the PD of current sector according to the movement of mobile terminal 230, but also may be used
It can send along (unintended) direction outside being intended to, and thus be received in the PD of nearby sectors.Therefore, if received
NACK signal do not indicate spatial mobility ask, then user may mistakenly be provided with terminal 230 direction, and
Thus NACK signal may be received in another sector.
In step 809, VLC device 220 detects the position of mobile terminal 230.More specifically, light source manager 224
The position of the initial sector belonging to mobile terminal 230 is known from the source address field of the MAC headers of the NACK signal received.
In this case, NACK signal and/or ack signal are received in nearby sectors, VLC device 220 can be based on including
Information in those signals continues data service by using the light source in initial sector.
In step 810, VLC device 220 determines whether there is the position including receiving NACK signal and is holding
The existing sector of row VLC.More specifically, VLC device 220 determines that the sector for receiving the position of NACK signal is to include movement
Sector from terminal 230 to its position moved, therefore VLC device 220 determine include mobile terminal 230 to its position moved
Whether sector is being used to carry out VLC with another existing mobile terminal.If sector has been activated and has been used for VLC,
Then VLC device 220 uses sector, that is, existing sector, the communication function without activating the light source in sector.
If existing sector is not present in step 815, in step 820, VLC device 220 is based on receiving NACK
The position of signal changes sector.But to make in step 825 if there are existing sector, VLC device 220 in step 815
With existing sector, and accessed in step 830 by using time division multiple acess (Time Division Multiple Access,
TDMA) the mobile terminal 230 in the existing sector of project management.TDMA scheme be used for avoid conflicting, because if with positioned at existing
Conflict is then likely occurred if some mobile terminal execution VLC in sector.Therefore, VLC device 220 allocates slots to often
A mobile terminal.For example, even if when mobile terminal 230 is moved to another mobile terminal 250 from visible ray effective coverage 1000
During another visible ray effective coverage 1010 at place, as shown in Figure 10, mobile terminal 230 can also be by using initial point
The time slot matched somebody with somebody is communicated with VLC device 220 without disturbing the mobile terminal in the visible ray effective coverage 1010 of existing sector
250。
When receiving ack signal in step 835, VLC device 220 is in step 840 based on receiving ack signal
Position correction visible ray effective coverage.But if reception ack signal and/or NACK signal are unsuccessfully less than N in step 845
Secondary, then VLC device 220 can activate larger sector to extend visible ray effective coverage 1100, as shown in Figure 11.
When receiving ack signal in this state, VLC device 220 is changed based on the position for receiving ack signal
Visible ray effective coverage 1200, as shown in figure 12.Specifically, VLC device 220 will be extended to detection mobile terminal 230
The visible ray effective coverage of signal narrows, to be adapted to the position of mobile terminal 230.
If receiving ack signal failure, no matter whether visible ray effective coverage changes, and VLC device 220 is in step 845
In all to receive ack signal and/or NACK signal failure number count, with determine failure number whether be N.If
The number of failure is N, then VLC device 220 determines that mobile terminal 230 has moved out the region managed by VLC device 220, and
Repeat to find that the discovery of another terminal operates at ' A ' place.
According to an embodiment of the invention, by the mobility in view of mobile terminal come only activate VLC needs light source, and
Non- all light sources using for VLC, can significantly reduce power consumption.Moreover, by continuously whether determining mobile terminal
It is mobile, seamless data service can be provided.
Although the present invention has shown and described by reference to the particular embodiment of the present invention, those skilled in the art will
Understand, the various changes in form and details can be carried out herein without departing from as defined by the appended claims of the invention
Spirit and scope.
Claims (34)
1. a kind of be used to be supported to perform the ambulant side with the terminal of the visible light communication VLC of the coordinator by coordinator
Method, this method include：
Using at least one light source of first community in multiple cells data are sent to the terminal；
Determine in first community whether from the terminal to receive response signal；
If the response signal is not received in first community, it is determined whether in the adjacent cell of first community from
The terminal receives response signal；And
If receiving response signal from the terminal in the adjacent cell, the adjacent cell is determined as servicing small
Area.
2. the method for claim 1, wherein each in the multiple cell can use the light source of predetermined quantity
Perform visible light communication.
3. the method for claim 1, wherein the response signal includes confirming ack signal and negative confirmation NACK letters
One of number.
4. the method as described in claim 1, further includes：
If not finding the terminal in the adjacent cell, carried out to receiving the number of failure of the response signal
Count；And
If the number of failure exceedes predetermined threshold, by search cell change to new adjacent cell, and in the new neighbour
The terminal is searched in nearly cell.
5. the method as described in claim 1, further includes：
Position another terminal in addition to the terminal；And
Visible ray effective coverage is provided separately for the terminal and another described terminal.
6. method as claimed in claim 5, further include and manage the terminal and described another using time division multiple acess TDMA scheme
A terminal.
7. the method for claim 1, wherein the coordinator includes access point AP.
8. the method for claim 1, wherein determine whether to receive response signal from the terminal in adjacent cell
It is to be performed during the same time slot of the terminal is distributed to.
9. a kind of be used to perform the coordinator with the visible light communication VLC of terminal, which includes：
Controller, at least one light source for being controlled so as to the first community into multiple cells send data, determine
Whether from the terminal response signal is received in first community, if not receiving the response letter in first community
Number, it is determined whether response signal is received from the terminal in the adjacent cell of first community, and if in the neighbour
Response signal is received from the terminal in nearly cell, then the adjacent cell is determined as serving cell.
10. coordinator as claimed in claim 9, wherein, the response signal includes one of the following：
Confirm ack signal；With
Negative confirmation NACK signal.
11. coordinator as claimed in claim 9, wherein, the controller positions another end in addition to the terminal
End, and it is provided separately visible ray effective coverage for the terminal and another described terminal.
12. coordinator as claimed in claim 11, wherein, the controller manages the end using time division multiple acess TDMA scheme
End and another described terminal.
13. coordinator as claimed in claim 9, wherein, the coordinator includes access point AP.
14. coordinator as claimed in claim 9, wherein, the controller is in the same time slot phase for distributing to the terminal
Between determine whether to receive response signal from the terminal in the adjacent cell of first community.
15. a kind of mobility method for being used to support the terminal in visible light communication VLC systems by coordinator, this method bag
Include：
Data are sent to the terminal in the sector including at least one light source；
If not receiving response signal from the terminal in the sector, search for and wherein receive institute from the terminal
State the sector of response signal；And
If having successfully received the response signal from the sector searched, searching for the response signal will be wherein received
Rope to sector be arranged to serving cell.
16. method as claimed in claim 15, wherein, the response signal received from the terminal is to confirm ACK letters
Number or negative confirmation NACK signal.
17. the method described in claim 16, further includes：
If being not received by confirmation ack signal, the number for receiving the failure for confirming ack signal is counted；And
If the number of failure is less than pre-determined number, the fan is extended by increasing the quantity for the light source for being used for sending data
Area.
18. method as claimed in claim 15, wherein, the coordinator includes access point AP.
19. method as claimed in claim 15, wherein, the sector is searched in the same time slot phase for distributing to the terminal
Between perform.
20. a kind of be used to perform the coordinator with the visible light communication VLC of terminal, which includes：
Controller, for being controlled so that at least one light source into sector sends data, if not from the sector
In the terminal receive response signal, then search for the sector that the response signal is wherein received from the terminal, and
The sector searched for wherein receiving the response signal is arranged to serving cell.
21. coordinator as claimed in claim 20, wherein, the response signal is to confirm ack signal or negative confirmation NACK
Signal.
22. coordinator as claimed in claim 21, wherein, the controller carries out the number for receiving the failure of ack signal
Count, and if the number of failure is less than pre-determined number, the sector is extended according to the number of the failure.
23. coordinator as claimed in claim 20, wherein, the controller is in the same time slot phase for distributing to the terminal
Between search for the sector.
24. a kind of mobile terminal for being used to perform visible light communication VLC, the mobile terminal include：
Transceiver, at least one light source for the first community from multiple cells by coordinator management receive data；
Controller, for controlling the transceiver to send response signal to the coordinator in response to receiving the data,
If not receiving the response signal in first community, adjacent cell of the transceiver from first community is controlled
At least one light source receive data, and
In response to the data received from the adjacent cell, the transceiver is controlled to send response letter to the coordinator
Number.
25. mobile terminal as claimed in claim 24, wherein, the controller controls the transceiver to be sent out to the coordinator
Instruction is sent to receive the negative confirmation NACK signal of data failure.
26. mobile terminal as claimed in claim 24, wherein, each in the multiple cell includes the use of predetermined quantity
In the light source of VLC.
27. mobile terminal as claimed in claim 24, wherein, the response signal includes confirming ack signal and negative confirmation
One of NACK signal.
28. a kind of method for performing visible light communication VLC, this method includes：
At least one light source of first community by mobile terminal from multiple cells by coordinator management receives data；
In response to receiving data, response signal is sent from the mobile terminal to the coordinator；
If not receiving the response signal in first community, by the mobile terminal from the adjacent cell of first community
At least one light source receive data；And
In response to the data from the adjacent cell, response signal is sent from the mobile terminal to the coordinator.
29. method as claimed in claim 28, further includes：
When receiving data failure from first community, the negative confirmation NACK signal that instruction receives data failure is sent.
30. method as claimed in claim 28, wherein, each in the multiple cell includes being used for for predetermined quantity
The light source of VLC.
31. method as claimed in claim 28, wherein, the response signal includes confirming ack signal and negative confirmation NACK
One of signal.
32. method as claimed in claim 28, wherein, if the mobile terminal leads to the coordinator in first community
Letter, the mobile terminal and another mobile terminal are managed by using time division multiple acess TDMA scheme.
33. a kind of mobile terminal for being used to perform visible light communication VLC, the mobile terminal include：
Transceiver, at least one light source for the first community from multiple cells by coordinator management receive data；And
Controller, for controlling the transceiver to send response signal to the coordinator in response to receiving data,
Wherein, if not receiving the response signal in first community, the coordinator determines whether small first
Response signal is received from the terminal in the adjacent cell in area, and if receiving the response signal from adjacent cell,
Then adjacent cell is arranged to serving cell by the coordinator.
34. mobile terminal as claimed in claim 33, wherein, the response signal includes confirming ack signal and negative confirmation
One of NACK signal.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020090088783A KR101653832B1 (en) | 2009-09-19 | 2009-09-19 | Apparatus and method for supporting mobility of mobile terminal performing visible light communication |
| KR10-2009-0088783 | 2009-09-19 | ||
| CN201080041654.9A CN102498682B (en) | 2009-09-19 | 2010-09-17 | Apparatus and method for supporting mobility of a mobile terminal that performs visible light communication |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201080041654.9A Division CN102498682B (en) | 2009-09-19 | 2010-09-17 | Apparatus and method for supporting mobility of a mobile terminal that performs visible light communication |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104579469A CN104579469A (en) | 2015-04-29 |
| CN104579469B true CN104579469B (en) | 2018-04-13 |
Family
ID=43756694
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410837818.9A Active CN104579469B (en) | 2009-09-19 | 2010-09-17 | Support the ambulant apparatus and method of the mobile terminal of execution visible light communication |
| CN201080041654.9A Active CN102498682B (en) | 2009-09-19 | 2010-09-17 | Apparatus and method for supporting mobility of a mobile terminal that performs visible light communication |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201080041654.9A Active CN102498682B (en) | 2009-09-19 | 2010-09-17 | Apparatus and method for supporting mobility of a mobile terminal that performs visible light communication |
Country Status (6)
| Country | Link |
|---|---|
| US (2) | US8488976B2 (en) |
| EP (1) | EP2478652B1 (en) |
| JP (2) | JP5302467B2 (en) |
| KR (1) | KR101653832B1 (en) |
| CN (2) | CN104579469B (en) |
| WO (1) | WO2011034390A2 (en) |
Families Citing this family (77)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8792790B2 (en) * | 2009-09-19 | 2014-07-29 | Samsung Electronics Co., Ltd | Apparatus and method for supporting mobility of a mobile terminal that performs visible light communication |
| KR101654934B1 (en) * | 2009-10-31 | 2016-09-23 | 삼성전자주식회사 | Visible communication method and apparatus |
| TR201105036A2 (en) * | 2011-05-24 | 2011-10-21 | Datça Si̇gorta Aracilik Hi̇zmetleri̇ Ltd. Şti̇. | Method of data communication via touch pad. |
| US10325571B2 (en) * | 2011-05-24 | 2019-06-18 | Osman Colakoglu | Data communication method via touch surface |
| US9418115B2 (en) | 2011-07-26 | 2016-08-16 | Abl Ip Holding Llc | Location-based mobile services and applications |
| US8334901B1 (en) | 2011-07-26 | 2012-12-18 | ByteLight, Inc. | Method and system for modulating a light source in a light based positioning system using a DC bias |
| US8994799B2 (en) | 2011-07-26 | 2015-03-31 | ByteLight, Inc. | Method and system for determining the position of a device in a light based positioning system using locally stored maps |
| US8436896B2 (en) | 2011-07-26 | 2013-05-07 | ByteLight, Inc. | Method and system for demodulating a digital pulse recognition signal in a light based positioning system using a Fourier transform |
| US8964016B2 (en) | 2011-07-26 | 2015-02-24 | ByteLight, Inc. | Content delivery based on a light positioning system |
| US8457502B2 (en) | 2011-07-26 | 2013-06-04 | ByteLight, Inc. | Method and system for modulating a beacon light source in a light based positioning system |
| US9787397B2 (en) | 2011-07-26 | 2017-10-10 | Abl Ip Holding Llc | Self identifying modulated light source |
| US9444547B2 (en) | 2011-07-26 | 2016-09-13 | Abl Ip Holding Llc | Self-identifying one-way authentication method using optical signals |
| US8520065B2 (en) | 2011-07-26 | 2013-08-27 | ByteLight, Inc. | Method and system for video processing to determine digital pulse recognition tones |
| US8416290B2 (en) | 2011-07-26 | 2013-04-09 | ByteLight, Inc. | Method and system for digital pulse recognition demodulation |
| US9723676B2 (en) | 2011-07-26 | 2017-08-01 | Abl Ip Holding Llc | Method and system for modifying a beacon light source for use in a light based positioning system |
| US8432438B2 (en) | 2011-07-26 | 2013-04-30 | ByteLight, Inc. | Device for dimming a beacon light source used in a light based positioning system |
| US8334898B1 (en) | 2011-07-26 | 2012-12-18 | ByteLight, Inc. | Method and system for configuring an imaging device for the reception of digital pulse recognition information |
| US8248467B1 (en) | 2011-07-26 | 2012-08-21 | ByteLight, Inc. | Light positioning system using digital pulse recognition |
| KR20130093699A (en) | 2011-12-23 | 2013-08-23 | 삼성전자주식회사 | Apparatus for receiving and transmitting optical information |
| JP6076691B2 (en) * | 2012-10-26 | 2017-02-08 | 川崎重工業株式会社 | Visible light communication system |
| US8942564B2 (en) * | 2012-11-07 | 2015-01-27 | Qualcomm Incorporated | Methods and apparatus for communicating information using visible light signals and/or radio signals |
| US9143230B2 (en) * | 2012-12-01 | 2015-09-22 | Qualcomm Incorporated | Methods and apparatus for communications using visible light communications signaling in combination with wireless radio signaling |
| US10951310B2 (en) * | 2012-12-27 | 2021-03-16 | Panasonic Intellectual Property Corporation Of America | Communication method, communication device, and transmitter |
| CN103973365B (en) * | 2013-01-29 | 2018-12-28 | 中兴通讯股份有限公司 | A kind of switching method of visible light communication equipment and terminal device in access point |
| US9705600B1 (en) | 2013-06-05 | 2017-07-11 | Abl Ip Holding Llc | Method and system for optical communication |
| US9509402B2 (en) | 2013-11-25 | 2016-11-29 | Abl Ip Holding Llc | System and method for communication with a mobile device via a positioning system including RF communication devices and modulated beacon light sources |
| CN103944636B (en) * | 2014-05-07 | 2016-03-30 | 东南大学 | A kind of lamp group coordinated dispatching method of distributed networking optical communication system |
| US9648452B1 (en) | 2014-06-05 | 2017-05-09 | ProSports Technologies, LLC | Wireless communication driven by object tracking |
| US9635506B1 (en) | 2014-06-05 | 2017-04-25 | ProSports Technologies, LLC | Zone based wireless player communications |
| US10290067B1 (en) | 2014-06-05 | 2019-05-14 | ProSports Technologies, LLC | Wireless concession delivery |
| US10592924B1 (en) | 2014-06-05 | 2020-03-17 | ProSports Technologies, LLC | Managing third party interactions with venue communications |
| US9711146B1 (en) | 2014-06-05 | 2017-07-18 | ProSports Technologies, LLC | Wireless system for social media management |
| US9608733B2 (en) * | 2014-06-09 | 2017-03-28 | Intel Corporation | Optical apparatus with multiple transmission power levels |
| KR102106315B1 (en) * | 2014-06-19 | 2020-05-06 | 한국전자통신연구원 | Method and apparatus for managing link on multi-layer networks |
| CN104039019B (en) * | 2014-06-30 | 2019-03-12 | 中国人民解放军信息工程大学 | A kind of visible light communication method, relevant apparatus and system |
| US9474933B1 (en) | 2014-07-11 | 2016-10-25 | ProSports Technologies, LLC | Professional workout simulator |
| US9305441B1 (en) | 2014-07-11 | 2016-04-05 | ProSports Technologies, LLC | Sensor experience shirt |
| US9724588B1 (en) | 2014-07-11 | 2017-08-08 | ProSports Technologies, LLC | Player hit system |
| WO2016007972A1 (en) | 2014-07-11 | 2016-01-14 | ProSports Technologies, LLC | Ticket upsell system |
| US9398213B1 (en) | 2014-07-11 | 2016-07-19 | ProSports Technologies, LLC | Smart field goal detector |
| US9591336B2 (en) | 2014-07-11 | 2017-03-07 | ProSports Technologies, LLC | Camera feed distribution from event venue virtual seat cameras |
| US9965938B1 (en) | 2014-07-11 | 2018-05-08 | ProSports Technologies, LLC | Restroom queue management |
| US9655027B1 (en) | 2014-07-11 | 2017-05-16 | ProSports Technologies, LLC | Event data transmission to eventgoer devices |
| WO2016007965A1 (en) | 2014-07-11 | 2016-01-14 | ProSports Technologies, LLC | Ball tracker camera |
| US9571903B2 (en) | 2014-07-11 | 2017-02-14 | ProSports Technologies, LLC | Ball tracker snippets |
| US9343066B1 (en) | 2014-07-11 | 2016-05-17 | ProSports Technologies, LLC | Social network system |
| US9760572B1 (en) | 2014-07-11 | 2017-09-12 | ProSports Technologies, LLC | Event-based content collection for network-based distribution |
| US9610491B2 (en) | 2014-07-11 | 2017-04-04 | ProSports Technologies, LLC | Playbook processor |
| US9502018B2 (en) | 2014-07-11 | 2016-11-22 | ProSports Technologies, LLC | Whistle play stopper |
| US9892371B1 (en) | 2014-07-28 | 2018-02-13 | ProSports Technologies, LLC | Queue information transmission |
| US9729644B1 (en) | 2014-07-28 | 2017-08-08 | ProSports Technologies, LLC | Event and fantasy league data transmission to eventgoer devices |
| US9607497B1 (en) | 2014-08-25 | 2017-03-28 | ProSports Technologies, LLC | Wireless communication security system |
| WO2016032714A1 (en) | 2014-08-25 | 2016-03-03 | ProSports Technologies, LLC | Disposable connectable wireless communication receiver |
| US9699523B1 (en) | 2014-09-08 | 2017-07-04 | ProSports Technologies, LLC | Automated clip creation |
| US10264175B2 (en) | 2014-09-09 | 2019-04-16 | ProSports Technologies, LLC | Facial recognition for event venue cameras |
| US9417090B2 (en) | 2014-09-11 | 2016-08-16 | ProSports Technologies, LLC | System to offer coupons to fans along routes to game |
| CN104506235B (en) * | 2014-12-10 | 2018-11-30 | 北京智谷睿拓技术服务有限公司 | Optical communication method and equipment |
| US9432117B2 (en) * | 2014-12-29 | 2016-08-30 | Industrial Technology Research Institute | Visible light communication apparatus and method of visible light communication |
| CN104539361B (en) * | 2015-01-04 | 2017-06-30 | 中国联合网络通信集团有限公司 | The method and lighting device of illumination range are adjusted in a kind of indoor visible light communication |
| JP6499047B2 (en) | 2015-09-17 | 2019-04-10 | 株式会社東芝 | Measuring device, method and program |
| CN105471500B (en) * | 2015-11-19 | 2018-09-07 | 广东顺德中山大学卡内基梅隆大学国际联合研究院 | A kind of LED array using colour temperature modulation is imaged positioning system |
| WO2017117519A1 (en) * | 2015-12-30 | 2017-07-06 | Surefire Llc | Optical narrowcasting |
| WO2017129614A1 (en) * | 2016-01-29 | 2017-08-03 | Philips Lighting Holding B.V. | Managing data traffic in hybrid application control systems |
| FR3048531B1 (en) * | 2016-03-01 | 2018-11-16 | Proton World International N.V. | SELECTION OF APPLICATION IN A MOBILE TERMINAL |
| CN105827314A (en) * | 2016-05-20 | 2016-08-03 | 中国人民解放军信息工程大学 | Visible light communication positioning system and method |
| CN210053626U (en) * | 2016-06-15 | 2020-02-11 | 萤香港有限公司 | Position estimation lighting system, lighting device, and lighting system |
| CN109219933B (en) * | 2016-06-30 | 2022-01-04 | 瑞典爱立信有限公司 | Controlling communication between a visible light communication access point and a user equipment |
| US9857162B1 (en) | 2016-09-22 | 2018-01-02 | Qualcomm Incorporated | Mobile device positioning using modulated light signals and coarse positioning information |
| KR20180058523A (en) | 2016-11-24 | 2018-06-01 | (주)유양디앤유 | Method and Apparatus for Managing Visible Light Communication Devices |
| JP2018113600A (en) * | 2017-01-12 | 2018-07-19 | カシオ計算機株式会社 | Light emitting device, imaging device, information transmission system, information transmission method, and program |
| CN106888057A (en) * | 2017-01-13 | 2017-06-23 | 维沃移动通信有限公司 | The method of reseptance and mobile terminal of a kind of optical signal |
| CN108551366B (en) * | 2018-02-05 | 2021-11-30 | 杭州电子科技大学 | Visible light communication method based on LED and mobile phone camera |
| CN108471329B (en) * | 2018-02-05 | 2021-11-30 | 杭州电子科技大学 | System architecture in visible light communication system based on LED and mobile phone camera |
| CH715164B1 (en) * | 2018-07-11 | 2022-12-30 | Slux Sagl | Electronic data transceiver device Associated data transceiver method and non-transient storage medium. |
| WO2020021367A1 (en) * | 2018-07-26 | 2020-01-30 | King Abdullah University Of Science And Technology | Illuminating and wireless communication transmitter using visible light |
| US11632173B2 (en) | 2019-02-18 | 2023-04-18 | Signify Holding B.V. | Method and system for communicating via light signals |
| FR3102622A1 (en) * | 2019-10-25 | 2021-04-30 | Orange | Communicating Light Lamp Automatic Selection Device and Mechanism |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1595846A (en) * | 2003-09-08 | 2005-03-16 | 宋杰 | A mobile radio optical communication system |
| CN101232327A (en) * | 2007-10-30 | 2008-07-30 | 华东理工大学 | Visible light space division multiple access multichannel communication system |
| CN101652801A (en) * | 2007-04-06 | 2010-02-17 | 皇家飞利浦电子股份有限公司 | Line-of-sight optical detection system and communication system |
Family Cites Families (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH022729A (en) * | 1988-06-15 | 1990-01-08 | Kubota Ltd | Wireless optical communication system |
| US5168575A (en) * | 1990-09-28 | 1992-12-01 | Motorola, Inc. | Demand driven wide-area radio system resource assignment method and apparatus |
| JPH10229368A (en) * | 1997-02-13 | 1998-08-25 | Nec Corp | Optical space transmitter |
| JP2005206620A (en) * | 2004-01-20 | 2005-08-04 | St Lcd Kk | Detergent |
| US20050181834A1 (en) * | 2004-02-12 | 2005-08-18 | Telefonaktiebolaget L M Ericsson (Publ) | Method and apparatus for cell-site ARQ generation under softer handoff conditions |
| JP2005236667A (en) * | 2004-02-19 | 2005-09-02 | Nippon Telegr & Teleph Corp <Ntt> | Communication system |
| US20060133290A1 (en) * | 2004-12-21 | 2006-06-22 | Bengt Lindoff | ACK/NACK detection in wireless communication |
| JP4689412B2 (en) * | 2005-08-31 | 2011-05-25 | 京セラ株式会社 | Transmitting apparatus and communication system |
| JP4337814B2 (en) * | 2005-12-27 | 2009-09-30 | 日本電気株式会社 | Visible light communication apparatus, visible light communication system, visible light communication method, and visible light communication program |
| JP2007312204A (en) * | 2006-05-19 | 2007-11-29 | Fujifilm Corp | Photographing system and photographing apparatus |
| KR101271293B1 (en) * | 2006-09-06 | 2013-06-04 | 삼성전자주식회사 | Hand over system of illumination light communication and method therefor |
| KR101355302B1 (en) * | 2007-05-11 | 2014-02-05 | 삼성전자주식회사 | Navigation system and method using visible light communication |
| KR100876725B1 (en) * | 2007-05-28 | 2008-12-31 | 삼성전자주식회사 | Communication link connection method in wireless LAN system using visible light communication |
| KR101376375B1 (en) * | 2007-07-20 | 2014-03-20 | 한국과학기술원 | Method and apparatus for indication status of mobile node in wireless local area network using visible light communication |
| KR101377308B1 (en) * | 2007-07-20 | 2014-04-01 | 한국과학기술원 | Method for changing duplex mode in wireless local area network using visible light comunication |
| JP2009053118A (en) * | 2007-08-28 | 2009-03-12 | Panasonic Electric Works Co Ltd | Direction specification system |
| KR101433939B1 (en) * | 2007-09-13 | 2014-08-26 | 삼성전자주식회사 | Method and apparatus for re-transmitting data in wireless local area network using visible light communication |
| KR101443376B1 (en) * | 2007-10-24 | 2014-11-04 | 삼성전자주식회사 | Method for transmitting/receiving data supporting scalability in a communication system |
| JP2009110818A (en) * | 2007-10-30 | 2009-05-21 | Toshiba Lighting & Technology Corp | Luminaire and lighting system |
| KR101508976B1 (en) * | 2007-12-31 | 2015-04-10 | 삼성전자주식회사 | navigation system and method using visible light communication |
| KR101015643B1 (en) * | 2008-06-17 | 2011-02-22 | 삼성전자주식회사 | Visible light communication method and apparatus |
| US20100318656A1 (en) * | 2009-06-16 | 2010-12-16 | Intel Corporation | Multiple-channel, short-range networking between wireless devices |
| US8620154B2 (en) * | 2009-07-31 | 2013-12-31 | Samsung Electronics Co., Ltd. | Methods and apparatus for fast and energy-efficient light recovery in a visible light communication (VLC) system |
| KR20120062788A (en) * | 2009-08-21 | 2012-06-14 | 인터디지탈 패튼 홀딩스, 인크 | Method and apparatus for a multi-radio access technology layer for splitting downlink-uplink over different radio access technologies |
-
2009
- 2009-09-19 KR KR1020090088783A patent/KR101653832B1/en active IP Right Grant
-
2010
- 2010-09-17 JP JP2012529691A patent/JP5302467B2/en active Active
- 2010-09-17 CN CN201410837818.9A patent/CN104579469B/en active Active
- 2010-09-17 CN CN201080041654.9A patent/CN102498682B/en active Active
- 2010-09-17 EP EP10817459.0A patent/EP2478652B1/en active Active
- 2010-09-17 WO PCT/KR2010/006450 patent/WO2011034390A2/en active Application Filing
- 2010-09-20 US US12/886,272 patent/US8488976B2/en active Active
-
2013
- 2013-06-11 JP JP2013122577A patent/JP5795610B2/en active Active
- 2013-06-20 US US13/922,998 patent/US9031416B2/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1595846A (en) * | 2003-09-08 | 2005-03-16 | 宋杰 | A mobile radio optical communication system |
| CN101652801A (en) * | 2007-04-06 | 2010-02-17 | 皇家飞利浦电子股份有限公司 | Line-of-sight optical detection system and communication system |
| CN101232327A (en) * | 2007-10-30 | 2008-07-30 | 华东理工大学 | Visible light space division multiple access multichannel communication system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102498682A (en) | 2012-06-13 |
| JP5795610B2 (en) | 2015-10-14 |
| US20130279917A1 (en) | 2013-10-24 |
| US20110069951A1 (en) | 2011-03-24 |
| US9031416B2 (en) | 2015-05-12 |
| CN102498682B (en) | 2015-01-28 |
| CN104579469A (en) | 2015-04-29 |
| WO2011034390A3 (en) | 2011-06-23 |
| JP2013219814A (en) | 2013-10-24 |
| EP2478652B1 (en) | 2023-03-15 |
| US8488976B2 (en) | 2013-07-16 |
| EP2478652A4 (en) | 2015-12-02 |
| WO2011034390A2 (en) | 2011-03-24 |
| JP2013504971A (en) | 2013-02-07 |
| KR20110031263A (en) | 2011-03-25 |
| EP2478652A2 (en) | 2012-07-25 |
| KR101653832B1 (en) | 2016-09-05 |
| JP5302467B2 (en) | 2013-10-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104579469B (en) | Support the ambulant apparatus and method of the mobile terminal of execution visible light communication | |
| US8792790B2 (en) | Apparatus and method for supporting mobility of a mobile terminal that performs visible light communication | |
| Boucouvalas et al. | Standards for indoor optical wireless communications | |
| JP5645944B2 (en) | Method and apparatus for determining the output of a visible frame in a visible light communication system | |
| US8565612B2 (en) | Visible light communication method and apparatus | |
| KR101708937B1 (en) | Method and apparatus for recovering link in visible light communication system | |
| US8452188B2 (en) | Visible light communication method and system | |
| US9985728B2 (en) | Method and apparatus for transmitting visibility frame according to setting of sleep mode in visible light communication system | |
| KR101709351B1 (en) | Method and apparatus for communicating for supporting multiple topologies in visible light communication | |
| US20120093517A1 (en) | Cell design and mobility support for visible light communication | |
| CN109889265B (en) | Indoor full-coverage communication positioning method and system based on visible light and infrared communication | |
| WO2013034362A1 (en) | An illumination control system, an illuminating device and a secondary controller | |
| KR100876725B1 (en) | Communication link connection method in wireless LAN system using visible light communication | |
| US20220141834A1 (en) | Unicast and groupcast transmissions over sidelink | |
| KR101769619B1 (en) | Apparatus and method for resource allocation in transmitter and receiver system of visible light communications | |
| KR20120028781A (en) | Apparatus and method for supporting mobility of mobile terminal performing visible light communication | |
| KR101530096B1 (en) | Method and system for recognizing state of uplink in wireless local area network using visible light communication | |
| CN106358219A (en) | Wireless data uplink transmission method and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |